The operation of a synapse
a. results from the passage of an electrical charge
across the gap.
b. involves a transmitter substance from vesicles in
the presynaptic neuron that act upon receptor
sites on the postsynaptic neuron.
c. occurs only between two nerves.
d. is limited only by the action of
acetylcholinesterase.
e. involves transduction of the electrochemical
energy of an action potential into mechanical
energy of movement.
Answer: b
You might also like to view...
You and a friend were in line for a movie when you noticed the woman in front of you sneezing and coughing
Both of you were equally exposed to the woman's virus, but over the next few days, only your friend acquired flu-like symptoms and was ill for almost a week before recovering. Which one of the following is a logical explanation for this? A) Your friend had antibodies to that virus. B) You had an adaptive immunity to that virus. C) Your friend had an autoimmune disorder. D) Your friend had allergies.
If a haploid cell goes through meiosis it will generate
a)four haploid cells. b)This is not possible. c)two haploid cells. d)four diploid cells. e)two diploid cells.
In the Schaffer-Fulton endospore stain, heat is a (fixation/mordant/staining) step
What will be an ideal response?
The end of the ________ era was marked by a transition into an explosion of life-forms rather than an extinction event
A) Precambrian B) Paleozoic C) Jurassic D) Mesozoic Refer to the scenario below, and then answer the following question(s). You are the managing naturalist for a natural history museum that has just received a batch of fossils from one of the field paleontologists sponsored by the museum. The note in the box states the fossils all came from the same rock layer. The museum is organized according to geologic timescale, and its management needs you to tell them to which department (based on era) and period specialist (an individual with experience with life-forms of a particular geologic-timescale period) the fossils should go. You find fossils of fish and seed-bearing plants but no reptiles or higher animals and no flowering plants.